Yes, that is correct. I don't think you will get a different variant - it might reshuffle the answers. It is great because you can give them answer specific feedback but you can also add generic hints, something that will lead them in the right direction without giving them the answer. If they get it right, it just moves them on to the next question.
As for your three options:
1. I don't think this is possible.
2. A new set of random questions with a new attempt but does not allow for what they might have got wrong or right in the first attempt.
3. Yes, this is what interactive mode does.
As for your three options:
1. I don't think this is possible.
2. A new set of random questions with a new attempt but does not allow for what they might have got wrong or right in the first attempt.
3. Yes, this is what interactive mode does.